topic Re: can't set AP230 power to 20dbm in Aerohive Migrated Content

can't set AP230 power to 20dbm

hunter_hu1 — Sat, 22 Sep 2018 13:17:55 GMT

When i setting the power to 20dbm, it's display as below:

AP02#interface wifi1 radio power 20

Warning: Power 20 exceeds HW limit(regulatory 10, board 19), forced to 10

AP and HM 's version both are 8.1r2

Re: can't set AP230 power to 20dbm

samantha_lynn — Tue, 25 Sep 2018 01:06:20 GMT

There was a change made to our power settings a while back, so that we could better match the regulatory standards of different locations and governments. It's a difference between EIRP power and actual power, and we are now displaying actual power rather than EIRP power. If you set the power to a level above the max allowed then it will adjust the power down to an allowed level.

Re: can't set AP230 power to 20dbm

hunter_hu1 — Tue, 25 Sep 2018 15:15:05 GMT

please send to me configuration steps, thanks.

Re: can't set AP230 power to 20dbm

samantha_lynn — Tue, 25 Sep 2018 18:51:38 GMT

I'm sorry, I'm not sure what configuration steps you're looking for. Do you mean how to set the power on the AP?

Re: can't set AP230 power to 20dbm

erivai — Tue, 25 Sep 2018 22:49:57 GMT

Hunter,

Please also use 8.4.r4. This version has the final power adjustment.

EIRP = Tx Power + antenna gain + chain gain - cable or connector loss

We allow 2.4GHz Tx power up to17dBm max in order to keep ERIP around 20 dBm. The actual Tx may be less than 17 depending on how many chains used by the AP and clients.

AP230#int wi0 radio power 20

Warning: Power 20 exceeds HW limit(regulatory 17, board 22), forced to 17

AP230#sh acsp

Interface Channel select state Primary channel Channel width Power ctrl state Tx power(dbm) Use Last Selection

--------- --------------------- ---------------- ------------- --------------------- ------------- ---------------------

Wifi0 Enable 6 20 Disable(User disable) 17* Channel:No Power:No

Wifi1 Disable(User disable) 108* 40 Disable(User disable) 20* Channel:No Power:No

AP230#sh ver

Version: HiveOS 8.4r4 build-207528

Build time: Thu Aug 30 07:36:55 UTC 2018

Build cookie: 1808300036-207528

Platform: AP230

Bootloader ver: v0.0.4.21

TPM ver: v1.2.37.17

Uptime: 0 weeks, 0 days, 0 hours, 5 minutes, 48 seconds

Re: can't set AP230 power to 20dbm

helpdesk48 — Wed, 24 Apr 2019 21:16:21 GMT

Hi,

I came across this when I checked the actual Tx on the AP CLI. I'm not quite sure how the regulatory max. and EIRP can be translated to the actual strength of the transmitted signal. I use one AP250 & one AP122 on the NG Cloud platform. The same results with version 8.4r4 and 10.0r4a:

The AP250 has wifi0 set to 17dBm and wifi1 to 20dBm, regulatory domain is Netherlands (528).

When the AP250 is rebooted it displays "Regulatory limit=18dBm(1)" for the wifi1 interface. After the ACSP scan is done it changes to "Regulatory limit=10dBm(1)".

"show interface wifi0": EIRP power=19.77*dBm(10dBm + 5.00dBi + 4.77dBi)

"show interface wifi1": EIRP power=14.77*dBm(5dBm + 5.00dBi + 4.77dBi)

How is it possible that the EIRP for wifi0 is 5dBm higher?

It's basically the same with the AP122.

Best regards,

Joost Noodelijk